1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/IRCE/unhandled.ll b/test/Transforms/IRCE/unhandled.ll
new file mode 100644
index 0000000..3531c48
--- /dev/null
+++ b/test/Transforms/IRCE/unhandled.ll
@@ -0,0 +1,37 @@
+; RUN: opt -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
+
+; Demonstrates that we don't currently handle the general expression
+; `A * I + B'.
+
+define void @general_affine_expressions(i32 *%arr, i32 *%a_len_ptr, i32 %n,
+                                        i32 %scale, i32 %offset) {
+; CHECK-NOT: constrained Loop at depth
+ entry:
+  %len = load i32* %a_len_ptr, !range !0
+  %first.itr.check = icmp sgt i32 %n, 0
+  br i1 %first.itr.check, label %loop, label %exit
+
+ loop:
+  %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]
+  %idx.next = add i32 %idx, 1
+  %idx.mul = mul i32 %idx, %scale
+  %array.idx = add i32 %idx.mul, %offset
+  %abc.high = icmp slt i32 %array.idx, %len
+  %abc.low = icmp sge i32 %array.idx, 0
+  %abc = and i1 %abc.low, %abc.high
+  br i1 %abc, label %in.bounds, label %out.of.bounds
+
+ in.bounds:
+  %addr = getelementptr i32* %arr, i32 %array.idx
+  store i32 0, i32* %addr
+  %next = icmp slt i32 %idx.next, %n
+  br i1 %next, label %loop, label %exit
+
+ out.of.bounds:
+  ret void
+
+ exit:
+  ret void
+}
+
+!0 = !{i32 0, i32 2147483647}